I have a total of 4 installs of CFS2, one for the original CFS2 PTO, one for ETO, one for Korea and one for In Defence of Australia. In all of them except for the original PTO, Quick Combat does not work properly. When exiting from a QC session, instead of going to the Outcome picture of the Debriefing screen, it defaults to the main CFS2 screen where you can choose Free Flight, Quick Combat, Missions etc. If you then select QC or press F it goes to the Outcome picture of the Debriefing screen but if you then try to fly QC again by pressing F or Fly Again you get a CTD. I have examined the CFS2.CFG and QC.MIS files carefully, comparing them to those in the PTO version that works correctly, but can't find anything wrong. I'm stumped. Anybody have any ideas about how I could troubleshoot further?